Terminal plate for telephone desk-stands.



G. NELSON. .TBR'MINAL PLATE FOR TELEPHONE DESK STANDS.

APPLICATION FILED AUG. 2, 1911.

1,01 6,847, v Patented Feb. 6, 1912.

I v 'IIVVENTOR mz ar J65? ATTORNEYS GUSTAV NELSON, OF NEW YORK, N. Y.

TERMINAL PLATE FOR TELEPHONE DESK-STANDS.

Specification of Letters Patent.

Patented Feb. 6, 1912.

Application filed August 2, 1911. Serial No. 642,036.

To all whom, it may concern:

Be it known that I, GUSTAV NELSON, acitizen of the United States, and aresident of the city of New York, borough of Brooklyn, in the county ofKings and State of New York, have invented a new and Improved TerminalPlate for Telephone Desk- Stands, of which the following is a full,clear, and exact description.

Among the principal objects which the present invention has in view are:to provide a terminal block which may be quickly and readily removedfrom the plate for repair or alteration; to provide a plate of thecharacter mentioned constructed from insulating material in a manner toprevent the leakage of current incident to constructions of thischaracter; to provide a simple and efficient mounting for the contactmembers; and to simplify the construction by eliminating the bushings atthe binding posts and the insulating strips between the contact springprevalent in the usual construction.

One embodiment of the present invention is disclosed in the structureillustrated in the accompanying drawings, in which like characters ofreference denote corresponding parts in all the views, and in which-Figure 1 is a vertical longitudinal section taken on the line 1-1 inFig. 3, of a plate constructed and arranged in accordance with thepresent invention; Fig. 2 is an edge view of the plate shown in Fig. 3,showing the upper half thereof in conjunction with a receiver hook for atelephone stand; Fig. 3 is a face View of a plate constructed andarranged in accordance with the present invention; Fig. 4 is a crosssection of the plate taken on the line 4.4 in Fig. 1; and Fig. 5 is aperspective view of the metal frame of a plate constructed and arrangedin accordance with the present invention.

It is to form the slot 10 that the framing plate 11 is bent to providethe offset portion 12, as seen in the drawings. The offset portion 12permits the sliding block 13 to enter between the undercut edge surfaces1 1 of the slot, as seen best in Fig. 4 of the drawings. At the end ofthe offset portion 12 a foot 15 is bent up in which is formed aperforation 16 to receive the structural holding screw by which theplate is held within the stand. It will be understood that in theordinary construction the plate 11 is straight throughout, not havingthe offset portion 12. Desiring to use the present constructed plate inconjunction with the usual stand, I elongate the foot 15 to register theperforation 16 with the hole provided for mounting the usual plate inthe usual stand.

The block 13 is constructed of hard rubber or other suitable electricinsulating material. The sides of the block 13 are grooved, as seen bestin Fig. 4 of the drawings, to receive the overhang of the edge surfaces14 when the said block 13 is forced into the slot 10. At the lower orfollowing end of the block 13 there is provided a pad 17, which pad 17bears against the offset portion 12. The portion of the block 13 havingthe pad 17 is perforated to receive the holding screw 18, which screwengages the threads in the perforation 19 after the block 13 has beenforced home in the slot 10.

The block 13 is grooved on the under or inner side to receive theelongated or T- shaped heads 20 of the various binding posts 21., 22, 23and 24, which posts are provided with the said heads. By thusconstructing the binding posts above mentioned and mounting the same sothat the elongated heads 20 extend within the slot provided to receivethe same, the said posts are conveniently and cheaply constructed toprevent rotation or turning of the same when the binding nuts are beingtightened.

At the upper or forward end of the block 13 a second pad 25 is provided.The pad 25 is projected from the outer face of the block 13, and is madesomewhat narrower than the said block. The pad 25 is provided to seatthe spring blade contact 26. The contact 26, as will be seen byreference to Figs. 1 and 3 of the drawings, is metallically andelectrically connected with the post 24. The spring blade contact 27 ismetallically and electrically connected with the post 23. To avoid thepossibility of metallic contact between the post 24 and the structuralportions of the blade 26 the blade 27 is perforated to extend over thepad 25, as seen best in Fig. 3 of the drawings. Adjacent the perforationmentioned the lateral edges 28 of the said blade are overturned toengage the pad on the block 13. The free end extensions of the blades 26and 27 are normally straight and held in substantially parallelrelation, as shown best in Fig. 2 of the drawings. From this positionthey are moved to the position shown in Fig. 1 of the drawings, wherethe ends of the said plates are pressed together in metallic contact bythe spring 29.

It is to hold the plate 27 rigidly in position and to prevent the liftthereof to impinge upon the blade 26, that I have provided a saw-cut orslot in the forward end of the block 13 and at a level with the base ofthe pad 25. hen installing the blade 27 the edge of the perforationformed therein to receive the pad 25 is first inserted in be removedfrom the the the saw-cut mentioned, and prior to fastening the saidblade in position on the block 13.

The spring 29 is rigidly secured to the plate 11 by the screws 30 set infrom the back of the said plate. The free end of the spring 29 isprovided to be engaged by the foot '31 depended from the bar 32 of thehook of the telephone stand which is provided to support the telephonereceiver.

When the'receiver is in place the bar 32 is depressed to force, by meansof the foot- 31, the spring 29 to rest upon the block 33. To guide andreceive the hook bar 32 a recess 34 is formed in the upper end of theplate 11.

Each of the posts 21 to 24 inclusive is provided with clamping nuts 35,which, when setup against the washers 36, hold the wires which lead infrom the main circuit and out to the receiver in the usual manner.

It will be observed that when a stand of the character mentioned isprovided with a plate and terminal block of the character described, theoperator may remove the screw extended in the perforation 16, when plate11 and the said block may be entirely or partially withdrawn from thecylinder of the stand. The block 13 may then plate 11 by removing thescrew 18 from the end of the blockhaving the pad 17. The screw 18 beingremoved the block 13 is drawn downward toward the foot 15 and withdrawnfrom the slot 10. The block is now in convenient position for alterationor repair. If, on the other hand, it is desired to save the time ofrepair, a new block may be quickly and ters Patent is 1. In a device ofthe character set forth, the combination with a terminal plate havingformed therein a slot; of an insulat-in block to rest within said slotand provided with the binding posts used by telephone stands; resilientcontact blades mounted on said block and electrically connected with twoof said posts, said blades being normally separated; a movable memberflexibly mounted on said plate at the upper end of said slot to holdsaid blades together, said movable member being arranged for movement bythe receiver hook of a telephone stand to release said blades; and meansfor holding said insulating block in said slot.

2. In a device of the character set forth, the combination with aterminal plate having formed therein a slot the sides whereof overhang;of an insulation block having binding posts mounted thereon, said blockhaving grooved sides to receive the overhanging sides of said slot; andmeans for holding said block in said slot.

, 3. In a device of the character set forth, a terminal plate havingformed therein an end opening slot the sides of said slot being extendedto form guides; and an insulating block having the binding posts for atelephone stand, said block being grooved to slide on the sides of saidslot and adapted for insertion within said slot from the open endthereof.

4. In a device of the characterset forth, a terminal plate having formedtherein an end opening slot the sides of said slo-tbeing extended toform guides; an insulating block having the binding posts for atelephone stand, said block being grooved to slide on the sides of saidslot and adapted for insertion within said slot from the open endthereof; anda holding screw for said block insertible therethrough toengage said plate after said block is in position.

' 5. In a terminal plate of the character set forth, an insulating blockhaving binding posts mounted thereon, said block having a pad extensionformed at the one end thereof to receive one of said posts; and aplurality of spring contact blades to engage two of said postsrespectively, one of said blades having a perforation formed therein toextend over said pad.

6. In a terminal plate of the character set forth, an insulating blockhaving binding posts mounted thereon, said block having a pad extensionformed at the one end thereof to receive one of said posts; and aplurality of spring contact blades to engage two of said postsrespectively, one of said blades being perforated to extend over saidpad and having downturned marginal edges to engage said block in holdingrelation.

7. In adevice of the character set forth, the combination with aterminal plate having an elongated slot and bent to form at the lowerend thereof an offset portion the L sides of said slot forming guidesopening the combination with a terminal plate having an elongated slotand bent to form at the lower end thereof an offset portion the sides ofsaid slot forming guides opening above said ofi'set portion; of aninsulating block having mounted thereon binding posts, the side of saidblock being grooved to hold the sides of said slot, said block be- 15ing insertible within said slot from above the said oflset portion; andan elongated foot for said offset portion perforated for securement upona telephone stand.

In testimony whereof I have signed my 20 name to this specification inthe presence of two subscrlblng witnesses.

GUSTAV NELSON. Witnesses E. F. MURDooK, JOHN P. DAVIS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

